• Smart Brake Bike Tail Light: Easy to set. Quick Double Click could turn on/off the Smart Brake Mode. If there is no movement in 10 seconds, it will turn off automatically, and it will light up immediately when you ride the bike again; The taillight will quickly switch to strong light mode for 3 seconds to warn the approaching drivers behind you when you are braking, which could make you a safer cycling.
  • Five Light Mode Options: Strobe(4.5 hours), Slow Strobe(18 hours), Meteor Flash(9.5 hours), Windmill Flash(12 hours), Breathing Flash(4.3 hours). You can switch different modes according to your needs and different occasions to get the best lighting experience.
  • Waterproof & Multipurpose: The taillight is made of IPX4 rated water resistant material to ensure a safe use in heavy rain. Lightweight and durable bike tail light that can be mounted on all bikes, children's bike, adult bicycle, handlebars, seat posts, dog collars or anywhere. It also can be used as helmet lights, backpack lights, warning lights and more.
  • NO Batteries Required: The rear light adopted high quality 400mAh battery and Low energy consumed but bright Led chips. Built in USB charge port for this bike rear light (USB cable included), which support up to 18hours playtime under slow-flashing mode, only after 2 hours charge.
  • Lifetime Support: Full 12 months Worry-Free warranty with lifetime support! 24-hour customer service support, just purchase and enjoy this superior product with confidence and risk free!

RYACO Bike Tail Light, Sport LED Rear Bike Light USB Rechargeable